Answer:
<h2>54 squared units.</h2>
Step-by-step explanation:
The area of the triangle in the image attached can be calculated with the formula to areas of triangles:

Where <em>b </em>is the base and <em>h </em>is the height. It's important to consider that the height is the segment that goes from a vertex to the opposite side, forming a right angle, like this case. This definition is really important because that's the clue to identify the height.
So, applying the formula to this problem, we have <em>b = 18 </em>and <em>h = 6.</em>

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<em>Therefore, the area of the given triangle is 54 squared units.</em>